Benson made his profession as a member of the community in 1901, at which time he had no thoughts of leaving the Church of England. But as he continued his studies and began writing, he became more and more uneasy with his own doctrinal position, and on 11 September 1903 he was received into the Roman Catholic Church.

He was ordained a Catholic priest in 1904 and sent to Cambridge. He continued his writing career along with the usual elements of priestly ministry. He was named a monsignor in 1911.

"Robert Hugh Benson: Life and Works," a biography by Janet Grayson was published in 1998.